Source code

001package org.apache.archiva.transaction;
002
003/*
004 * Licensed to the Apache Software Foundation (ASF) under one
005 * or more contributor license agreements.  See the NOTICE file
006 * distributed with this work for additional information
007 * regarding copyright ownership.  The ASF licenses this file
008 * to you under the Apache License, Version 2.0 (the
009 * "License"); you may not use this file except in compliance
010 * with the License.  You may obtain a copy of the License at
011 *
012 *   http://www.apache.org/licenses/LICENSE-2.0
013 *
014 * Unless required by applicable law or agreed to in writing,
015 * software distributed under the License is distributed on an
016 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
017 * KIND, either express or implied.  See the License for the
018 * specific language governing permissions and limitations
019 * under the License.
020 */
021
022import org.apache.archiva.checksum.ChecksumAlgorithm;
023
024import java.io.IOException;
025import java.nio.file.Files;
026import java.nio.file.Path;
027import java.util.List;
028
029/**
030 * Event for creating a file from a string content.
031 *
032 *
033 */
034public class CreateFileEvent
035    extends AbstractTransactionEvent
036{
037    private final Path destination;
038
039    private final String content;
040
041    /**
042     * 
043     * @param content
044     * @param destination
045     * @param checksumAlgorithms digesters to use for checksumming
046     */
047    public CreateFileEvent( String content, Path destination, List<ChecksumAlgorithm> checksumAlgorithms )
048    {
049        super( checksumAlgorithms );
050        this.content = content;
051        this.destination = destination;
052    }
053
054    @Override
055    public void commit()
056        throws IOException
057    {
058        createBackup( destination );
059
060        mkDirs( destination.getParent() );
061
062        if ( !Files.exists(destination))
063        {
064            Files.createFile(destination);
065        }
066
067        writeStringToFile( destination, content );
068
069        createChecksums( destination, true );
070    }
071
072    @Override
073    public void rollback()
074        throws IOException
075    {
076        Files.deleteIfExists(destination);
077
078        revertFilesCreated();
079
080        revertMkDirs();
081
082        restoreBackups();
083    }
084}